Tektronix and Keithley

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I am using Keithley 248 high voltage supply, and it seems that the voltage resolution is 1v when using the front panel.
Would it be possible to get better resolution (0.1v or 0.01v) when I'm programming it through labview/command control?
I would like to able to make fine changes at high voltage (around 3kv).
Thanks.